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<title>Using as: TILEPro Registers</title>

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Next: <a href="TILEPro-Modifiers.html#TILEPro-Modifiers" accesskey="n" rel="next">TILEPro Modifiers</a>, Previous: <a href="TILEPro-Opcodes.html#TILEPro-Opcodes" accesskey="p" rel="prev">TILEPro Opcodes</a>, Up: <a href="TILEPro-Syntax.html#TILEPro-Syntax" accesskey="u" rel="up">TILEPro Syntax</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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<a name="Register-Names-17"></a>
<h4 class="subsubsection">9.46.2.2 Register Names</h4>
<a name="index-TILEPro-register-names"></a>
<a name="index-register-names_002c-TILEPro"></a>

<p>General-purpose registers are represented by predefined symbols of the
form &lsquo;<samp>r<var>N</var></samp>&rsquo;, where <var>N</var> represents a number between
<code>0</code> and <code>63</code>.  However, the following registers have
canonical names that must be used instead:
</p>
<dl compact="compact">
<dt><code>r54</code></dt>
<dd><p>sp
</p>
</dd>
<dt><code>r55</code></dt>
<dd><p>lr
</p>
</dd>
<dt><code>r56</code></dt>
<dd><p>sn
</p>
</dd>
<dt><code>r57</code></dt>
<dd><p>idn0
</p>
</dd>
<dt><code>r58</code></dt>
<dd><p>idn1
</p>
</dd>
<dt><code>r59</code></dt>
<dd><p>udn0
</p>
</dd>
<dt><code>r60</code></dt>
<dd><p>udn1
</p>
</dd>
<dt><code>r61</code></dt>
<dd><p>udn2
</p>
</dd>
<dt><code>r62</code></dt>
<dd><p>udn3
</p>
</dd>
<dt><code>r63</code></dt>
<dd><p>zero
</p>
</dd>
</dl>

<p>The assembler will emit a warning if a numeric name is used instead of
the canonical name.  The <code>.no_require_canonical_reg_names</code>
assembler pseudo-op turns off this
warning. <code>.require_canonical_reg_names</code> turns it back on.
</p>



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